src/domain/Commodity.cs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

namespace domain
{
  using System;
  using System.Collections.Generic;
  using System.Linq;

  public class Gas : ICommodity
  {
    public Percent PercentageFrom(IComposition composition)
    {
      return composition.PercentageFor<Gas>();
    }
  }

  public class Oil : ICommodity
  {
    public Percent PercentageFrom(IComposition composition)
    {
      return composition.PercentageFor<Oil>();
    }
  }

  public class NGL : ICommodity
  {
    public Percent PercentageFrom(IComposition composition)
    {
      return composition.PercentageFor<NGL>();
    }
  }

  public class Condensate : ICommodity
  {
    public Percent PercentageFrom(IComposition composition)
    {
      return composition.PercentageFor<Condensate>();
    }
  }

  public class All : ICommodity
  {
    public Percent PercentageFrom(IComposition composition)
    {
      return composition.PercentageFor<Gas>()
        .Plus(composition.PercentageFor<Oil>())
        .Plus(composition.PercentageFor<NGL>())
        .Plus(composition.PercentageFor<Condensate>());
    }
  }

  public interface ICommodity
  {
    Percent PercentageFrom(IComposition composition);
  }
}